| Sparks to Smolyan | 6,400.82 mi (10,301.13 km) |
| Sparks to Sofia | 6,300.15 mi (10,139.10 km) |
| Sparks to Sopot | 6,336.10 mi (10,196.97 km) |
| Sparks to Sozopol | 6,415.52 mi (10,324.78 km) |
| Sparks to Sredets | 6,409.03 mi (10,314.33 km) |
| Sparks to Stamboliyski | 6,363.03 mi (10,240.30 km) |
| Sparks to Stara Zagora | 6,369.83 mi (10,251.26 km) |
| Sparks to Svilengrad | 6,423.57 mi (10,337.74 km) |
| Sparks to Svishtov | 6,289.74 mi (10,122.36 km) |
| Sparks to Targovishte | 6,339.45 mi (10,202.37 km) |
| Sparks to Teteven | 6,308.61 mi (10,152.72 km) |
| Sparks to Troyan | 6,320.94 mi (10,172.56 km) |
| Sparks to Tryavna | 6,339.57 mi (10,202.55 km) |
| Sparks to Tutrakan | 6,290.20 mi (10,123.10 km) |
| Sparks to Varna | 6,369.76 mi (10,251.14 km) |
